floppy_ttl.cpp File Reference

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/io.h>
#include "midas.h"
#include "crate.h"
#include "diag.h"

Go to the source code of this file.

Functions
INT	floppy_ttl_init ()
INT	floppy_ttl_start_block ()
INT	floppy_ttl_poll_live ()
INT	floppy_ttl_poll_dead ()

Variables
struct readout_module	floppy_ttl_module

Function Documentation

INT floppy_ttl_init

(

)

Definition at line 36 of file floppy_ttl.cpp.

References diag_print(), status, and SUCCESS.

{
  int status = iopl( 3 );

  if (status < 0) {
    diag_print(0, "Unable to get permission to access I/O ports\n");
  }

  // turn off output
  outb(0x1d, 0x3f2);

  return SUCCESS;
}

INT floppy_ttl_poll_dead

(

)

Definition at line 99 of file floppy_ttl.cpp.

References FE_NEED_START.

{
    return FE_NEED_START;
}

INT floppy_ttl_poll_live

(

)

Definition at line 87 of file floppy_ttl.cpp.

References FE_END_BLOCK, and SUCCESS.

{
  int input = inb(0x3f7);

  // high bit of input: 1 = TTL LOW, 0 = TTL HIGH
  if(!(input & 0x80)) {
    return FE_END_BLOCK;
  } else {
    return SUCCESS;
  }
}

INT floppy_ttl_start_block

(

)

Definition at line 54 of file floppy_ttl.cpp.

References printf(), ready, and SUCCESS.

{
  // Produce a quick pulse on the output
  outb(0x0d, 0x3f2);
  outb(0x1d, 0x3f2);

  bool ready = false;
  DWORD start_waiting = ss_millitime();
  while(!ready && ss_millitime() < start_waiting + 1000) {
//  while(!ready) {
    int input = inb(0x3f7);
    if((input & 0x80)) {
      ready = true;
    }
  }

  if(!ready) {
    printf("\n\n\nNot ready, start times out\n");
  }

  return SUCCESS;
}

Variable Documentation

struct readout_module floppy_ttl_module

Initial value:

= {
  floppy_ttl_init,        
  NULL,                   
  NULL,                   
  NULL,                   
  NULL,                   
  floppy_ttl_poll_live,   
  floppy_ttl_poll_dead,   
  floppy_ttl_start_block, 
  NULL,                   
  NULL,                   
}

Definition at line 17 of file floppy_ttl.cpp.